Bottle Organ

Different notes come from different air-space lengths. Ask students to predict what will happen. Blow across bottle tops. Key idea: The air column resonates; more water means a shorter air column and higher pitch. Ask: How is this different from tapping the bottles? Safety and cleanup: Teacher demonstrates blowing; no sharing. https://www.google.com/search?q=%22Bottle+Organ%22+science+demonstration+experiment